ID: 250

AQSQID: 080013001

Site Name: Welby - 78th Ave. & Steele St.

Added: April 21, 2020, 6:24 p.m.

Updated: March 1, 2021, 6:32 p.m.

Location: Denver (Steele St), CO

Reporting: True, Located: True

Current AQI: 45.0

Denver (Steele St) CO, US: 39.8392, -104.9489

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 1, 2021, 5 p.m. N/A N/A N/A 20.0 ppb (19) N/A 0.0 ppb (0) 31.0 ppb (29) 0.26 ppb (4) 47.8 μg/m3 (45) N/A 45.0
 
March 1, 2021, 4 p.m. N/A N/A N/A 25.0 ppb (24) N/A 0.0 ppb (0) 25.0 ppb (24) 0.29 ppb (4) 42.4 μg/m3 (40) N/A 40.0
 
March 1, 2021, 3 p.m. N/A N/A N/A 39.0 ppb (37) N/A N/A 15.0 ppb (14) 0.54 ppb (6) 66.2 μg/m3 (57) N/A 57.0
 
March 1, 2021, 2 p.m. N/A N/A N/A 50.0 ppb (48) N/A 2.0 ppb (3) N/A N/A 92.0 μg/m3 (70) N/A 70.0
 
March 1, 2021, 1 p.m. N/A N/A N/A 51.0 ppb (49) N/A 1.0 ppb (2) 1.0 ppb (1) 0.78 ppb (10) 49.4 μg/m3 (46) N/A 49.0
 
March 1, 2021, noon N/A N/A N/A 50.0 ppb (48) N/A 0.0 ppb (0) 1.0 ppb (1) 0.55 ppb (7) 24.3 μg/m3 (23) N/A 48.0
 
March 1, 2021, 11 a.m. N/A N/A N/A 43.0 ppb (41) N/A 0.0 ppb (0) 1.0 ppb (1) 0.4 ppb (5) 14.4 μg/m3 (14) N/A 41.0
 
March 1, 2021, 10 a.m. N/A N/A N/A 43.0 ppb (41) N/A 0.0 ppb (0) 1.0 ppb (1) 0.5 ppb (6) 15.9 μg/m3 (15) N/A 41.0
 
March 1, 2021, 9 a.m. N/A N/A N/A 44.0 ppb (42) N/A 0.0 ppb (0) 1.0 ppb (1) 0.62 ppb (7) 23.0 μg/m3 (22) N/A 42.0
 
March 1, 2021, 8 a.m. N/A N/A N/A 42.0 ppb (40) N/A 0.0 ppb (0) 1.0 ppb (1) 0.49 ppb (6) 18.5 μg/m3 (18) N/A 40.0
 
March 1, 2021, 7 a.m. N/A N/A N/A 43.0 ppb (41) N/A 0.0 ppb (0) 1.0 ppb (1) 0.44 ppb (5) 25.4 μg/m3 (24) N/A 41.0
 
March 1, 2021, 6 a.m. N/A N/A N/A 40.0 ppb (38) N/A 0.0 ppb (0) 5.0 ppb (5) 0.36 ppb (5) 17.7 μg/m3 (17) N/A 38.0
 
March 1, 2021, 5 a.m. N/A N/A N/A 41.0 ppb (39) N/A 0.0 ppb (0) 4.0 ppb (4) 0.38 ppb (5) 26.4 μg/m3 (25) N/A 39.0
 
March 1, 2021, 4 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 11.0 ppb (11) 0.37 ppb (5) 32.4 μg/m3 (30) N/A 30.0
 
March 1, 2021, 3 a.m. N/A N/A N/A 31.0 ppb (30) N/A 0.0 ppb (0) 16.0 ppb (15) 0.42 ppb (5) 20.7 μg/m3 (20) N/A 30.0
 
March 1, 2021, 2 a.m. N/A N/A N/A 23.0 ppb (22) N/A 0.0 ppb (0) 24.0 ppb (23) 0.36 ppb (5) 28.6 μg/m3 (27) N/A 27.0
 
March 1, 2021, 1 a.m. N/A N/A N/A 10.0 ppb (10) N/A 0.0 ppb (0) 39.0 ppb (37) 0.29 ppb (4) 17.0 μg/m3 (16) N/A 37.0
 
March 1, 2021, midnight N/A N/A N/A 5.0 ppb (5) N/A 0.0 ppb (0) 45.0 ppb (42) 0.31 ppb (4) 14.3 μg/m3 (14) N/A 42.0
 
Feb. 28, 2021, 11 p.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 48.0 ppb (45) 0.24 ppb (3) 6.1 μg/m3 (6) N/A 45.0
 
Feb. 28, 2021, 10 p.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 47.0 ppb (44) 0.2 ppb (3) 22.2 μg/m3 (21) N/A 44.0
 
Feb. 28, 2021, 9 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 47.0 ppb (44) 0.17 ppb (3) 21.7 μg/m3 (21) N/A 44.0
 
Feb. 28, 2021, 8 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 47.0 ppb (44) 0.17 ppb (3) 15.1 μg/m3 (14) N/A 44.0
 
Feb. 28, 2021, 7 p.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 46.0 ppb (43) 0.18 ppb (3) 15.8 μg/m3 (15) N/A 43.0
 
Feb. 28, 2021, 6 p.m. N/A N/A N/A 4.0 ppb (4) N/A 0.0 ppb (0) 45.0 ppb (42) 0.18 ppb (3) 6.5 μg/m3 (7) N/A 42.0
 
Feb. 28, 2021, 5 p.m. N/A N/A N/A 4.0 ppb (4) N/A 0.0 ppb (0) 43.0 ppb (40) 0.19 ppb (3) 12.1 μg/m3 (12) N/A 40.0
 
Feb. 28, 2021, 4 p.m. N/A N/A N/A 9.0 ppb (9) N/A 1.0 ppb (2) 38.0 ppb (36) 0.2 ppb (3) 7.7 μg/m3 (8) N/A 36.0
 
Feb. 28, 2021, 3 p.m. N/A N/A N/A 29.0 ppb (28) N/A 1.0 ppb (2) 20.0 ppb (19) 0.41 ppb (5) 17.0 μg/m3 (16) N/A 28.0
 
Feb. 28, 2021, 2 p.m. N/A N/A N/A 38.0 ppb (36) N/A 0.0 ppb (0) 9.0 ppb (9) 0.49 ppb (6) 21.8 μg/m3 (21) N/A 36.0
 
Feb. 28, 2021, 1 p.m. N/A N/A N/A 40.0 ppb (38) N/A 0.0 ppb (0) 4.0 ppb (4) 0.43 ppb (5) 13.4 μg/m3 (13) N/A 38.0
 
Feb. 28, 2021, noon N/A N/A N/A 30.0 ppb (29) N/A 0.0 ppb (0) 10.0 ppb (10) 0.51 ppb (6) 9.8 μg/m3 (10) N/A 29.0
 
Feb. 28, 2021, 11 a.m. N/A N/A N/A 24.0 ppb (23) N/A 0.0 ppb (0) 16.0 ppb (15) 0.44 ppb (5) 9.0 μg/m3 (9) N/A 23.0
 
Feb. 28, 2021, 10 a.m. N/A N/A N/A 16.0 ppb (16) N/A 0.0 ppb (0) 25.0 ppb (24) 0.31 ppb (4) 12.7 μg/m3 (12) N/A 24.0
 
Feb. 28, 2021, 9 a.m. N/A N/A N/A 7.0 ppb (7) N/A 0.0 ppb (0) 37.0 ppb (35) 0.23 ppb (3) 11.6 μg/m3 (11) N/A 35.0
 
Feb. 28, 2021, 8 a.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 44.0 ppb (41) 0.25 ppb (3) 5.8 μg/m3 (6) N/A 41.0
 
Feb. 28, 2021, 7 a.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 45.0 ppb (42) 0.18 ppb (3) 0.0 μg/m3 (0) N/A 42.0
 
Feb. 28, 2021, 6 a.m. N/A N/A N/A 13.0 ppb (13) N/A 0.0 ppb (0) 34.0 ppb (32) 0.28 ppb (4) 21.2 μg/m3 (20) N/A 32.0
 
Feb. 28, 2021, 5 a.m. N/A N/A N/A 5.0 ppb (5) N/A 0.0 ppb (0) 43.0 ppb (40) 0.2 ppb (3) 5.8 μg/m3 (6) N/A 40.0
 
Feb. 28, 2021, 4 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 46.0 ppb (43) 0.17 ppb (3) 5.1 μg/m3 (5) N/A 43.0
 
Feb. 28, 2021, 3 a.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 45.0 ppb (42) 0.29 ppb (4) 5.5 μg/m3 (6) N/A 42.0
 
Feb. 28, 2021, 2 a.m. N/A N/A N/A 4.0 ppb (4) N/A 0.0 ppb (0) 45.0 ppb (42) 0.31 ppb (4) 4.8 μg/m3 (5) N/A 42.0
 
Feb. 28, 2021, 1 a.m. N/A N/A N/A 5.0 ppb (5) N/A 0.0 ppb (0) 44.0 ppb (41) 0.26 ppb (4) 12.2 μg/m3 (12) N/A 41.0
 
Feb. 28, 2021, midnight N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 47.0 ppb (44) 0.23 ppb (3) 5.8 μg/m3 (6) N/A 44.0
 
Feb. 27, 2021, 11 p.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 48.0 ppb (45) 0.22 ppb (3) 5.5 μg/m3 (6) N/A 45.0
 
Feb. 27, 2021, 10 p.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 49.0 ppb (46) 0.22 ppb (3) 13.7 μg/m3 (13) N/A 46.0
 
Feb. 27, 2021, 9 p.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 49.0 ppb (46) 0.19 ppb (3) 10.1 μg/m3 (10) N/A 46.0
 
Feb. 27, 2021, 8 p.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 47.0 ppb (44) 0.18 ppb (3) 27.3 μg/m3 (26) N/A 44.0
 
Feb. 27, 2021, 7 p.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 47.0 ppb (44) 0.17 ppb (3) 21.0 μg/m3 (20) N/A 44.0
 
Feb. 27, 2021, 6 p.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 47.0 ppb (44) 0.17 ppb (3) 8.9 μg/m3 (9) N/A 44.0
 
Feb. 27, 2021, 5 p.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 46.0 ppb (43) 0.17 ppb (3) 17.4 μg/m3 (17) N/A 43.0
 
Feb. 27, 2021, 4 p.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 45.0 ppb (42) 0.17 ppb (3) 9.2 μg/m3 (9) N/A 42.0
 
Feb. 27, 2021, 3 p.m. N/A N/A N/A 5.0 ppb (5) N/A 0.0 ppb (0) 40.0 ppb (38) 0.17 ppb (3) 7.6 μg/m3 (8) N/A 38.0
 
Feb. 27, 2021, 2 p.m. N/A N/A N/A 11.0 ppb (11) N/A 0.0 ppb (0) 33.0 ppb (31) 0.23 ppb (3) 15.7 μg/m3 (15) N/A 31.0
 
Feb. 27, 2021, 1 p.m. N/A N/A N/A 13.0 ppb (13) N/A 0.0 ppb (0) 28.0 ppb (26) 0.35 ppb (4) 11.5 μg/m3 (11) N/A 26.0
 
Feb. 27, 2021, noon N/A N/A N/A 9.0 ppb (9) N/A 0.0 ppb (0) 33.0 ppb (31) 0.35 ppb (4) 11.0 μg/m3 (11) N/A 31.0
 
Feb. 27, 2021, 11 a.m. N/A N/A N/A 7.0 ppb (7) N/A 0.0 ppb (0) 35.0 ppb (33) 0.16 ppb (3) 5.3 μg/m3 (5) N/A 33.0
 
Feb. 27, 2021, 10 a.m. N/A N/A N/A 9.0 ppb (9) N/A 0.0 ppb (0) 33.0 ppb (31) 0.15 ppb (2) 6.5 μg/m3 (7) N/A 31.0
 
Feb. 27, 2021, 9 a.m. N/A N/A N/A 9.0 ppb (9) N/A 0.0 ppb (0) 34.0 ppb (32) 0.15 ppb (2) 7.6 μg/m3 (8) N/A 32.0
 
Feb. 27, 2021, 8 a.m. N/A N/A N/A 9.0 ppb (9) N/A 0.0 ppb (0) 33.0 ppb (31) 0.14 ppb (2) 6.9 μg/m3 (7) N/A 31.0
 
Feb. 27, 2021, 7 a.m. N/A N/A N/A 7.0 ppb (7) N/A 0.0 ppb (0) 35.0 ppb (33) 0.13 ppb (2) 4.3 μg/m3 (4) N/A 33.0
 
Feb. 27, 2021, 6 a.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 42.0 ppb (39) 0.12 ppb (2) 5.4 μg/m3 (5) N/A 39.0
 
Feb. 27, 2021, 5 a.m. N/A N/A N/A 14.0 ppb (14) N/A 0.0 ppb (0) 36.0 ppb (34) 0.19 ppb (3) 6.0 μg/m3 (6) N/A 34.0
 
Feb. 27, 2021, 4 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 18.0 ppb (17) 0.32 ppb (4) 23.2 μg/m3 (22) N/A 22.0
 
Feb. 27, 2021, 3 a.m. N/A N/A N/A 33.0 ppb (32) N/A 0.0 ppb (0) 24.0 ppb (23) 0.42 ppb (5) 32.0 μg/m3 (30) N/A 32.0
 
Feb. 27, 2021, 2 a.m. N/A N/A N/A 39.0 ppb (37) N/A 0.0 ppb (0) 14.0 ppb (13) 0.6 ppb (7) 42.5 μg/m3 (40) N/A 40.0
 
Feb. 27, 2021, 1 a.m. N/A N/A N/A 35.0 ppb (34) N/A 0.0 ppb (0) 24.0 ppb (23) 0.43 ppb (5) 17.3 μg/m3 (17) N/A 34.0
 
Feb. 27, 2021, midnight N/A N/A N/A 23.0 ppb (22) N/A 0.0 ppb (0) 35.0 ppb (33) 0.32 ppb (4) 15.0 μg/m3 (14) N/A 33.0
 
Feb. 26, 2021, 11 p.m. N/A N/A N/A 15.0 ppb (15) N/A 0.0 ppb (0) 44.0 ppb (41) 0.26 ppb (4) 16.9 μg/m3 (16) N/A 41.0
 
Feb. 26, 2021, 10 p.m. N/A N/A N/A 10.0 ppb (10) N/A 0.0 ppb (0) 50.0 ppb (47) 0.21 ppb (3) 15.8 μg/m3 (15) N/A 47.0
 
Feb. 26, 2021, 9 p.m. N/A N/A N/A 6.0 ppb (6) N/A 0.0 ppb (0) 50.0 ppb (47) 0.13 ppb (2) 15.9 μg/m3 (15) N/A 47.0
 
Feb. 26, 2021, 8 p.m. N/A N/A N/A 7.0 ppb (7) N/A 0.0 ppb (0) 49.0 ppb (46) 0.12 ppb (2) 12.7 μg/m3 (12) N/A 46.0
 
Feb. 26, 2021, 7 p.m. N/A N/A N/A 4.0 ppb (4) N/A 0.0 ppb (0) 49.0 ppb (46) 0.1 ppb (2) 17.9 μg/m3 (17) N/A 46.0
 
Feb. 26, 2021, 6 p.m. N/A N/A N/A 21.0 ppb (20) N/A 1.0 ppb (2) 41.0 ppb (38) 0.22 ppb (3) 0.4 μg/m3 (1) N/A 38.0
 
Feb. 26, 2021, 5 p.m. N/A N/A N/A 51.0 ppb (49) N/A 1.0 ppb (2) 19.0 ppb (18) 0.63 ppb (7) 50.3 μg/m3 (47) N/A 49.0
 
Feb. 26, 2021, 4 p.m. N/A N/A N/A 55.0 ppb (53) N/A 2.0 ppb (3) 10.0 ppb (10) 0.86 ppb (11) 67.6 μg/m3 (58) N/A 58.0
 
Feb. 26, 2021, 3 p.m. N/A N/A N/A 44.0 ppb (42) N/A 1.0 ppb (2) 9.0 ppb (9) 0.79 ppb (10) 35.1 μg/m3 (33) N/A 42.0
 
Feb. 26, 2021, 2 p.m. N/A N/A N/A 50.0 ppb (48) N/A 2.0 ppb (3) 4.0 ppb (4) 1.01 ppb (12) 53.0 μg/m3 (50) N/A 50.0
 
Feb. 26, 2021, 1 p.m. N/A N/A N/A 49.0 ppb (47) N/A 2.0 ppb (3) N/A 1.04 ppb (12) 27.8 μg/m3 (26) N/A 47.0
 
Feb. 26, 2021, noon N/A N/A N/A 47.0 ppb (45) N/A 1.0 ppb (2) 1.0 ppb (1) 0.83 ppb (10) 16.7 μg/m3 (16) N/A 45.0
 
Feb. 26, 2021, 11 a.m. N/A N/A N/A 46.0 ppb (44) N/A 0.0 ppb (0) 1.0 ppb (1) 0.6 ppb (7) 12.6 μg/m3 (12) N/A 44.0
 
Feb. 26, 2021, 10 a.m. N/A N/A N/A 45.0 ppb (43) N/A 0.0 ppb (0) 1.0 ppb (1) 0.54 ppb (6) 8.0 μg/m3 (8) N/A 43.0
 
Feb. 26, 2021, 9 a.m. N/A N/A N/A 46.0 ppb (44) N/A 1.0 ppb (2) 1.0 ppb (1) 0.6 ppb (7) 19.8 μg/m3 (19) N/A 44.0
 
Feb. 26, 2021, 8 a.m. N/A N/A N/A 49.0 ppb (47) N/A 1.0 ppb (2) 1.0 ppb (1) 0.92 ppb (11) 21.5 μg/m3 (20) N/A 47.0
 
Feb. 26, 2021, 7 a.m. N/A N/A N/A 50.0 ppb (48) N/A 1.0 ppb (2) 1.0 ppb (1) 0.85 ppb (10) 10.4 μg/m3 (10) N/A 48.0
 
Feb. 26, 2021, 6 a.m. N/A N/A N/A 50.0 ppb (48) N/A 0.0 ppb (0) 1.0 ppb (1) 0.78 ppb (10) 17.4 μg/m3 (17) N/A 48.0
 
Feb. 26, 2021, 5 a.m. N/A N/A N/A 47.0 ppb (45) N/A 0.0 ppb (0) 2.0 ppb (2) 0.74 ppb (8) 12.0 μg/m3 (12) N/A 45.0
 
Feb. 26, 2021, 4 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 3.0 ppb (3) 0.6 ppb (7) 19.1 μg/m3 (18) N/A 18.0
 
Feb. 26, 2021, 3 a.m. N/A N/A N/A 41.0 ppb (39) N/A 0.0 ppb (0) 9.0 ppb (9) 0.66 ppb (8) 18.1 μg/m3 (17) N/A 39.0
 
Feb. 26, 2021, 2 a.m. N/A N/A N/A 35.0 ppb (34) N/A 0.0 ppb (0) 17.0 ppb (16) 0.62 ppb (7) 17.6 μg/m3 (17) N/A 34.0
 
Feb. 26, 2021, 1 a.m. N/A N/A N/A 29.0 ppb (28) N/A 0.0 ppb (0) 25.0 ppb (24) 0.49 ppb (6) 20.3 μg/m3 (19) N/A 28.0
 
Feb. 26, 2021, midnight N/A N/A N/A 17.0 ppb (17) N/A 0.0 ppb (0) 42.0 ppb (39) 0.35 ppb (4) 9.9 μg/m3 (10) N/A 39.0
 
Feb. 25, 2021, 11 p.m. N/A N/A N/A 12.0 ppb (12) N/A 0.0 ppb (0) 49.0 ppb (46) 0.29 ppb (4) 5.7 μg/m3 (6) N/A 46.0
 
Feb. 25, 2021, 10 p.m. N/A N/A N/A 7.0 ppb (7) N/A 0.0 ppb (0) 52.0 ppb (49) 0.24 ppb (3) 10.0 μg/m3 (10) N/A 49.0
 
Feb. 25, 2021, 9 p.m. N/A N/A N/A 5.0 ppb (5) N/A 0.0 ppb (0) 52.0 ppb (49) 0.2 ppb (3) 8.1 μg/m3 (8) N/A 49.0
 
Feb. 25, 2021, 8 p.m. N/A N/A N/A 6.0 ppb (6) N/A 0.0 ppb (0) 47.0 ppb (44) 0.21 ppb (3) 14.2 μg/m3 (14) N/A 44.0
 
Feb. 25, 2021, 7 p.m. N/A N/A N/A 7.0 ppb (7) N/A 0.0 ppb (0) 42.0 ppb (39) 0.22 ppb (3) 7.4 μg/m3 (7) N/A 39.0
 
Feb. 25, 2021, 6 p.m. N/A N/A N/A 9.0 ppb (9) N/A 0.0 ppb (0) 39.0 ppb (37) 0.24 ppb (3) 2.8 μg/m3 (3) N/A 37.0
 
Feb. 25, 2021, 5 p.m. N/A N/A N/A 16.0 ppb (16) N/A 0.0 ppb (0) 34.0 ppb (32) 0.26 ppb (4) 22.8 μg/m3 (22) N/A 32.0
 
Feb. 25, 2021, 4 p.m. N/A N/A N/A 30.0 ppb (29) N/A 0.0 ppb (0) 22.0 ppb (21) 0.37 ppb (5) 9.7 μg/m3 (9) N/A 29.0
 
Feb. 25, 2021, 3 p.m. N/A N/A N/A 29.0 ppb (28) N/A 0.0 ppb (0) 15.0 ppb (14) 0.58 ppb (7) 33.2 μg/m3 (31) N/A 31.0
 
Feb. 25, 2021, 2 p.m. N/A N/A N/A 37.0 ppb (35) N/A 0.0 ppb (0) 9.0 ppb (9) 0.89 ppb (11) 24.7 μg/m3 (23) N/A 35.0
 
Feb. 25, 2021, 1 p.m. N/A N/A N/A 26.0 ppb (25) N/A 0.0 ppb (0) 13.0 ppb (13) 0.52 ppb (6) N/A N/A 25.0
 
Feb. 25, 2021, noon N/A N/A N/A 11.0 ppb (11) N/A 0.0 ppb (0) 28.0 ppb (26) 0.33 ppb (4) N/A N/A 26.0
 
Feb. 25, 2021, 11 a.m. N/A N/A N/A 7.0 ppb (7) N/A 0.0 ppb (0) 35.0 ppb (33) 0.19 ppb (3) 3.1 μg/m3 (3) N/A 33.0
 
Feb. 25, 2021, 10 a.m. N/A N/A N/A 5.0 ppb (5) N/A 0.0 ppb (0) 38.0 ppb (36) 0.17 ppb (3) 2.0 μg/m3 (2) N/A 36.0
 
Feb. 25, 2021, 9 a.m. N/A N/A N/A 6.0 ppb (6) N/A 0.0 ppb (0) 38.0 ppb (36) 0.14 ppb (2) 1.9 μg/m3 (2) N/A 36.0
 
Feb. 25, 2021, 8 a.m. N/A N/A N/A 5.0 ppb (5) N/A 0.0 ppb (0) 38.0 ppb (36) 0.14 ppb (2) 1.7 μg/m3 (2) N/A 36.0
 
Feb. 25, 2021, 7 a.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 41.0 ppb (38) 0.13 ppb (2) 1.6 μg/m3 (2) N/A 38.0
 
Feb. 25, 2021, 6 a.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 42.0 ppb (39) 0.13 ppb (2) 1.8 μg/m3 (2) N/A 39.0
 
Feb. 25, 2021, 5 a.m. N/A N/A N/A 5.0 ppb (5) N/A 0.0 ppb (0) 39.0 ppb (37) 0.16 ppb (3) 1.9 μg/m3 (2) N/A 37.0
 
Feb. 25, 2021, 4 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 39.0 ppb (37) 0.14 ppb (2) 3.4 μg/m3 (4) N/A 37.0
 
Feb. 25, 2021, 3 a.m. N/A N/A N/A 4.0 ppb (4) N/A 0.0 ppb (0) 40.0 ppb (38) 0.2 ppb (3) 0.9 μg/m3 (1) N/A 38.0
 
Feb. 25, 2021, 2 a.m. N/A N/A N/A 5.0 ppb (5) N/A 0.0 ppb (0) 40.0 ppb (38) 0.2 ppb (3) 5.1 μg/m3 (5) N/A 38.0
 
Feb. 25, 2021, 1 a.m. N/A N/A N/A 4.0 ppb (4) N/A 0.0 ppb (0) 41.0 ppb (38) 0.2 ppb (3) 26.7 μg/m3 (25) N/A 38.0
 
Feb. 25, 2021, midnight N/A N/A N/A 5.0 ppb (5) N/A 0.0 ppb (0) 42.0 ppb (39) 0.2 ppb (3) 34.7 μg/m3 (33) N/A 39.0
 
Feb. 24, 2021, 11 p.m. N/A N/A N/A 5.0 ppb (5) N/A 0.0 ppb (0) 44.0 ppb (41) 0.2 ppb (3) 15.5 μg/m3 (15) N/A 41.0
 
Feb. 24, 2021, 10 p.m. N/A N/A N/A 4.0 ppb (4) N/A 0.0 ppb (0) 45.0 ppb (42) 0.18 ppb (3) 8.2 μg/m3 (8) N/A 42.0
 
Feb. 24, 2021, 9 p.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 45.0 ppb (42) 0.13 ppb (2) 21.7 μg/m3 (21) N/A 42.0
 
Feb. 24, 2021, 8 p.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 48.0 ppb (45) 0.12 ppb (2) 12.9 μg/m3 (12) N/A 45.0
 
Feb. 24, 2021, 7 p.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 44.0 ppb (41) 0.13 ppb (2) 7.5 μg/m3 (7) N/A 41.0
 
Feb. 24, 2021, 6 p.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 42.0 ppb (39) 0.14 ppb (2) 7.9 μg/m3 (8) N/A 39.0
 
Feb. 24, 2021, 5 p.m. N/A N/A N/A 4.0 ppb (4) N/A 0.0 ppb (0) 41.0 ppb (38) 0.14 ppb (2) 12.7 μg/m3 (12) N/A 38.0
 
Feb. 24, 2021, 4 p.m. N/A N/A N/A 7.0 ppb (7) N/A 0.0 ppb (0) 39.0 ppb (37) 0.14 ppb (2) 20.6 μg/m3 (20) N/A 37.0
 
Feb. 24, 2021, 3 p.m. N/A N/A N/A 23.0 ppb (22) N/A 0.0 ppb (0) 25.0 ppb (24) 0.28 ppb (4) 16.3 μg/m3 (16) N/A 24.0
 
Feb. 24, 2021, 2 p.m. N/A N/A N/A 33.0 ppb (32) N/A 0.0 ppb (0) 12.0 ppb (12) 0.32 ppb (4) 28.0 μg/m3 (26) N/A 32.0
 
Feb. 24, 2021, 1 p.m. N/A N/A N/A 34.0 ppb (33) N/A 0.0 ppb (0) 10.0 ppb (10) 0.29 ppb (4) 34.0 μg/m3 (32) N/A 33.0
 
Feb. 24, 2021, noon N/A N/A N/A 20.0 ppb (19) N/A 0.0 ppb (0) 22.0 ppb (21) 0.21 ppb (3) 18.2 μg/m3 (17) N/A 21.0
 
Feb. 24, 2021, 11 a.m. N/A N/A N/A 16.0 ppb (16) N/A 0.0 ppb (0) 27.0 ppb (25) 0.2 ppb (3) 8.7 μg/m3 (9) N/A 25.0
 
Feb. 24, 2021, 10 a.m. N/A N/A N/A 9.0 ppb (9) N/A 0.0 ppb (0) 36.0 ppb (34) 0.16 ppb (3) 7.7 μg/m3 (8) N/A 34.0
 
Feb. 24, 2021, 9 a.m. N/A N/A N/A 9.0 ppb (9) N/A 0.0 ppb (0) 36.0 ppb (34) 0.19 ppb (3) 6.3 μg/m3 (6) N/A 34.0
 
Feb. 24, 2021, 8 a.m. N/A N/A N/A 7.0 ppb (7) N/A 0.0 ppb (0) 37.0 ppb (35) 0.17 ppb (3) 5.8 μg/m3 (6) N/A 35.0
 
Feb. 24, 2021, 7 a.m. N/A N/A N/A 5.0 ppb (5) N/A 0.0 ppb (0) 38.0 ppb (36) 0.18 ppb (3) 4.8 μg/m3 (5) N/A 36.0
 
Feb. 24, 2021, 6 a.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 40.0 ppb (38) 0.18 ppb (3) 5.6 μg/m3 (6) N/A 38.0
 
Feb. 24, 2021, 5 a.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 40.0 ppb (38) 0.16 ppb (3) 10.9 μg/m3 (11) N/A 38.0
 
Feb. 24, 2021, 4 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 40.0 ppb (38) 0.16 ppb (3) 17.2 μg/m3 (16) N/A 38.0
 
Feb. 24, 2021, 3 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 47.0 ppb (44) 0.17 ppb (3) 26.9 μg/m3 (25) N/A 44.0
 
Feb. 24, 2021, 2 a.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 48.0 ppb (45) 0.17 ppb (3) 6.6 μg/m3 (7) N/A 45.0
 
Feb. 24, 2021, 1 a.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 47.0 ppb (44) 0.2 ppb (3) 10.0 μg/m3 (10) N/A 44.0
 
Feb. 24, 2021, midnight N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 48.0 ppb (45) 0.18 ppb (3) 21.6 μg/m3 (20) N/A 45.0
 
Feb. 23, 2021, 11 p.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 48.0 ppb (45) 0.17 ppb (3) 24.0 μg/m3 (23) N/A 45.0
 
Feb. 23, 2021, 10 p.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 47.0 ppb (44) 0.16 ppb (3) 15.3 μg/m3 (15) N/A 44.0
 
Feb. 23, 2021, 9 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 47.0 ppb (44) 0.1 ppb (2) 11.0 μg/m3 (11) N/A 44.0
 
Feb. 23, 2021, 8 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 47.0 ppb (44) 0.11 ppb (2) 17.6 μg/m3 (17) N/A 44.0
 
Feb. 23, 2021, 7 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 47.0 ppb (44) 0.11 ppb (2) 14.5 μg/m3 (14) N/A 44.0
 
Feb. 23, 2021, 6 p.m. N/A N/A N/A 15.0 ppb (15) N/A 0.0 ppb (0) 37.0 ppb (35) 0.22 ppb (3) 28.0 μg/m3 (26) N/A 35.0
 
Feb. 23, 2021, 5 p.m. N/A N/A N/A 34.0 ppb (33) N/A 1.0 ppb (2) 21.0 ppb (20) 0.44 ppb (5) 49.5 μg/m3 (46) N/A 46.0
 
Feb. 23, 2021, 4 p.m. N/A N/A N/A 34.0 ppb (33) N/A 1.0 ppb (2) 17.0 ppb (16) 0.42 ppb (5) 46.5 μg/m3 (44) N/A 44.0
 
Feb. 23, 2021, 3 p.m. N/A N/A N/A 40.0 ppb (38) N/A 2.0 ppb (3) 9.0 ppb (9) 0.58 ppb (7) 71.6 μg/m3 (60) N/A 60.0
 
Feb. 23, 2021, 2 p.m. N/A N/A N/A 46.0 ppb (44) N/A 3.0 ppb (5) 3.0 ppb (3) 0.77 ppb (10) 82.5 μg/m3 (65) N/A 65.0
 
Feb. 23, 2021, 1 p.m. N/A N/A N/A 40.0 ppb (38) N/A 1.0 ppb (2) 1.0 ppb (1) 0.37 ppb (5) 30.1 μg/m3 (28) N/A 38.0
 
Feb. 23, 2021, noon N/A N/A N/A 36.0 ppb (34) N/A 1.0 ppb (2) 3.0 ppb (3) 0.29 ppb (4) 24.9 μg/m3 (24) N/A 34.0
 
Feb. 23, 2021, 11 a.m. N/A N/A N/A 36.0 ppb (34) N/A 0.0 ppb (0) 2.0 ppb (2) 0.3 ppb (4) 30.4 μg/m3 (29) N/A 34.0
 
Feb. 23, 2021, 10 a.m. N/A N/A N/A 21.0 ppb (20) N/A 0.0 ppb (0) 19.0 ppb (18) 0.2 ppb (3) 9.9 μg/m3 (10) N/A 20.0
 
Feb. 23, 2021, 9 a.m. N/A N/A N/A 12.0 ppb (12) N/A 0.0 ppb (0) 29.0 ppb (27) 0.23 ppb (3) 9.1 μg/m3 (9) N/A 27.0
 
Feb. 23, 2021, 8 a.m. N/A N/A N/A 33.0 ppb (32) N/A 0.0 ppb (0) 2.0 ppb (2) 0.37 ppb (5) 20.5 μg/m3 (19) N/A 32.0
 
Feb. 23, 2021, 7 a.m. N/A N/A N/A 29.0 ppb (28) N/A 0.0 ppb (0) 8.0 ppb (8) 0.36 ppb (5) 15.7 μg/m3 (15) N/A 28.0
 
Feb. 23, 2021, 6 a.m. N/A N/A N/A 33.0 ppb (32) N/A 0.0 ppb (0) 1.0 ppb (1) 0.47 ppb (6) 29.7 μg/m3 (28) N/A 32.0
 
Feb. 23, 2021, 5 a.m. N/A N/A N/A 36.0 ppb (34) N/A 0.0 ppb (0) 2.0 ppb (2) 0.46 ppb (6) 41.8 μg/m3 (39) N/A 39.0
 
Feb. 23, 2021, 4 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 5.0 ppb (5) 0.42 ppb (5) 42.2 μg/m3 (40) N/A 40.0
 
Feb. 23, 2021, 3 a.m. N/A N/A N/A 14.0 ppb (14) N/A 0.0 ppb (0) 24.0 ppb (23) 0.27 ppb (4) 22.2 μg/m3 (21) N/A 23.0
 
Feb. 23, 2021, 2 a.m. N/A N/A N/A 7.0 ppb (7) N/A 0.0 ppb (0) 37.0 ppb (35) 0.21 ppb (3) 8.6 μg/m3 (8) N/A 35.0
 
Feb. 23, 2021, 1 a.m. N/A N/A N/A 6.0 ppb (6) N/A 0.0 ppb (0) 38.0 ppb (36) 0.21 ppb (3) 14.0 μg/m3 (13) N/A 36.0
 
Feb. 23, 2021, midnight N/A N/A N/A 7.0 ppb (7) N/A 0.0 ppb (0) 38.0 ppb (36) 0.21 ppb (3) 20.9 μg/m3 (20) N/A 36.0
 
Feb. 22, 2021, 11 p.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 42.0 ppb (39) 0.23 ppb (3) 13.3 μg/m3 (13) N/A 39.0
 
Feb. 22, 2021, 10 p.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 42.0 ppb (39) 0.17 ppb (3) 11.5 μg/m3 (11) N/A 39.0
 
Feb. 22, 2021, 9 p.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 43.0 ppb (40) 0.18 ppb (3) 9.4 μg/m3 (9) N/A 40.0
 
Feb. 22, 2021, 8 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 44.0 ppb (41) 0.17 ppb (3) 10.1 μg/m3 (10) N/A 41.0
 
Feb. 22, 2021, 7 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 45.0 ppb (42) 0.17 ppb (3) 10.5 μg/m3 (10) N/A 42.0
 
Feb. 22, 2021, 6 p.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 45.0 ppb (42) 0.19 ppb (3) 15.1 μg/m3 (14) N/A 42.0